To add a tip, you have 3 choices:
1) Members: log in to add a tip
2) Non-members: register and all future tips will be added instantly
3) Non-members: suggest a tip without registering (but we'll need to check it first)

Android manages Apps very well and some Apps do not have the option to close them specifically. Normally the App will stay running in the background and only close when many other Apps have been opened.

If you do want to close or terminate an App, then press and hold the Home key on your phone. Then you can swipe the Apps off the screen to close them.

Sometimes the problem can be with the phone or operators skin or launcher, so try going to the Play Store and downloading a third party launcher such as Nova launcher or Go LauncherEx. Note: you will need to re-create your homescreen shortcuts, but they are both great launchers.

Another tip is to always press the Back key instead of the Home key when leaving Apps. The Back key will often close the App properly, while the Home key will leave it running in the background.

The following is a list of commands that can be used for the Google Now service. This can be accessed by using the Google Search widget on your homescreen. Simply press the little microphone icon and say the commands below:

General
Search for
Who invented
Show me the stocks for
Author of
How old is
How tall is

Time & Date
What time is it in
When is the in
When is the sunset in
What is the time zone of
Time at home

Weather
Show me the weather
Is it going to rain tomorrow?
Do I need an umbrella?
Do I need a jacket
What is the weather in
How is the weather on going to be?

Maps / Location
Map of
Show me the nearby on map
Where is situated?
in
Navigate to in car
I am hungry (shows all nearby food points on map)
How far is from

Calculations / Conversions
How much is times
What is percent of
Square root of
… equals
What is the numerical value of Pi
Convert into
Temperature of the sun

Sports
points table
Who won the last match between and
scorecard
Schedule of games

Websites
Go to
Open
Show me
Browse to

Entertainment
Listen to
Play
YouTube
When was the first episode of
movies
Who acted in
Who is the producer of
When was released
Runtime of

Notes / Reminders
Remind me to at
Wake me up in
at
Self note to
Set alarm for